The telephone number 0151 065 1333 is being used as part of a HMRC scam, involving a premium rate number. Potential victims of this fraud are warned that there is a HMRC fraud case against them.
They are then told by the HMRC impersonators that they must press 1 on their keypad in order to avoid immediate arrest. In fact anyone who does press 1 will immediately be connected to a premium rate phone line.
Do not answer any calls to this number. Report to HMRC.